third_party/WebKit/LayoutTests/http/tests/security/canvas-remote-read-data-url-image.html

   1 <pre id="console"></pre>
   2 <script>
   3 if (window.testRunner) {
   4     testRunner.dumpAsText();
   5     testRunner.waitUntilDone();
   6 }
   7
   8 log = function(msg)
   9 {
  10     document.getElementById('console').appendChild(document.createTextNode(msg + "\n"));
  11 }
  12
  13 testGetImageData = function(context, description)
  14 {
  15     description = "Calling getImageData() from a canvas tainted by a " + description;
  16     try {
  17         var imageData = context.getImageData(0,0,100,100);
  18         log("PASS: " + description + " was allowed.");
  19     } catch (e) {
  20         log("FAIL: " + description + " was not allowed - Threw error: " + e + ".");
  21     }
  22 }
  23
  24 testToDataURL = function(canvas, description)
  25 {
  26     description = "Calling toDataURL() on a canvas tainted by a " + description;
  27     try {
  28         var dataURL = canvas.toDataURL();
  29         log("PASS: " + description + " was allowed.");
  30     } catch (e) {
  31         log("FAIL: " + description + " was not allowed - Threw error: " + e + ".");
  32     }
  33 }
  34
  35 test = function(canvas, description)
  36 {
  37     testGetImageData(canvas.getContext("2d"), description);
  38     testToDataURL(canvas, description);
  39 }
  40
  41 var image = new Image();
  42 image.onload = function() {
  43     var canvas = document.createElement("canvas");
  44     canvas.width = 100;
  45     canvas.height = 100;
  46     var context = canvas.getContext("2d");
  47
  48     // Test reading from a canvas after drawing a data URL image onto it
  49     context.drawImage(image, 0, 0, 100, 100);
  50
  51     test(canvas, "data URL image");
  52
  53     // Test reading after using a data URL pattern
  54     canvas = document.createElement("canvas");
  55     canvas.width = 100;
  56     canvas.height = 100;
  57     var context = canvas.getContext("2d");
  58     var remoteImagePattern = context.createPattern(image, "repeat");
  59     context.fillStyle = remoteImagePattern;
  60     context.fillRect(0, 0, 100, 100);
  61
  62     test(canvas, "data URL image pattern");
  63
  64     if (window.testRunner)
  65         testRunner.notifyDone();
  66 }
  67
  68 // A small red dot.
  69 image.src = "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAoAAAAKCAYAAACNMs+9AAAABGdBTUEAALGPC/xhBQAAAAlwSFlzAAALEwAACxMBAJqcGAAAAAd0SU1FB9YGARc5KB0XV+IAAAAddEVYdENvbW1lbnQAQ3JlYXRlZCB3aXRoIFRoZSBHSU1Q72QlbgAAAF1JREFUGNO9zL0NglAAxPEfdLTs4BZM4DIO4C7OwQg2JoQ9LE1exdlYvBBeZ7jqch9//q1uH4TLzw4d6+ErXMMcXuHWxId3KOETnnXXV6MJpcq2MLaI97CER3N0vr4MkhoXe0rZigAAAABJRU5ErkJggg==";
  70 </script>